Illness - Probably from all the Jet A I keep getting on myself when fueling.
Medication - You aren't? Not even tylenol?
Stress - Uhhh? What's my job again? Oh yeah... comes with the territory.
Alcohol - Works better than sleeping pills and is "more" legal.
Fatigue - No, never, not even on my normal 16-18 hour duty cycles.
Emotion - Refer to "S", "A", and "F".
This is from the reality of being a pilot.